Concord Company purchased a piece of equipment at the beginning of 2017. The equipment cost $455,040. It has an estimated service life of 8 years and an expected salvage value of $75,960. The sum-of-the-years'-digits method of depreciation is being used. Someone has already correctly prepared a depreciation schedule for this asset. This schedule shows that $63,180 will be depreciated for a particular calendar year. Determine for what particular year the depreciation amount for this asset will be $63,180. Year of depreciation